With the update to 12.21 a display error occurs in defined backgrounds

With the update to 12.21 a display error occurs in defined backgrounds.

When I open an archive, the background of the tab changes. And when I leave the archive the default background is visible again. It's set.
But now, if there is only one archive (Zip,RAR,7Z) in the folder, the background is changed immediately. When I open the archive, the background is changed as desired.
But if I leave the folder with the archives, the background is not changed to the default background and remains until I open a custom folder.
I didn't mean for this to happen.

I also tried all the setting options, either the error remains or the background does not change as desired.
I only want to have a different background in archives, and not if there is only one archive in the folder.

How can I change it? Help!!

addition: Behavior in the second window



2